Marx, W.; Bornmann, L.; Barth, A.; Leydesdorff, L.: Detecting the historical roots of research fields by reference publication year spectroscopy (RPYS) (2014)
0.02
0.018127698 = product of:
0.036255397 = sum of:
0.036255397 = product of:
0.072510794 = sum of:
0.072510794 = weight(_text_:56 in 1238) [ClassicSimilarity], result of:
0.072510794 = score(doc=1238,freq=2.0), product of:
0.22549127 = queryWeight, product of:
4.1578603 = idf(docFreq=1879, maxDocs=44218)
0.054232527 = queryNorm
0.32156807 = fieldWeight in 1238, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.1578603 = idf(docFreq=1879, maxDocs=44218)
0.0546875 = fieldNorm(doc=1238)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 18. 3.2014 18:56:54